The system is P25 Phase-I. At the minumum, the FDMA scanners below will work, they can be acquired 2nd hand. The TDMA scanners below will also do the job but they are a bit more expensive since they're more up-to-date
That's true. However, many scanner hobbyists have found that a Unication pager is a suitable alternative for monitoring a single trunk system that is simulcast. Before a scanner manufacturer provided a solution for the simulcast problem, hobbyists could buy a simulcast-compatible Unication that was more affordable than buying a commercial two-way digital radio. And hobbyists who can live with their limitations are still buying and using them.The OP asked about "scanners" anyway. The G4 and G5 are NOT scanners.
That's true. However, many scanner hobbyists have found that a Unication pager is a suitable alternative for monitoring a single trunk system that is simulcast. Before a scanner manufacturer provided a solution for the simulcast problem, hobbyists could buy a simulcast-compatible Unication that was more affordable than buying a commercial two-way digital radio. And hobbyists who can live with their limitations are still buying and using them.